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Cron 突然每 15 分钟调用一次脚本

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Cron 突然每 15 分钟调用一次脚本

在 Debian 服务器上，我有一个 crontab 条目，应该每天凌晨 04:21 调用一个脚本。

这就是它所做的，直到今天..但现在该脚本每 15 分钟调用一次，没有任何原因！

我已经几个月没有更改 crontab 了！

这是 crontab 行：

21 4 * * * /usr/bin/wget -O /dev/null http://www.domain.tld/tasks/hebdomadaire.php &> /dev/null

这是 Apache 日志 ( cat access.log | grep "hebdomadaire" )：

SERVER_IP - - [28/Mar/2016:04:21:01 +0000] "GET /tasks/hebdomadaire.php HTTP/1.1" 200 454 "-" "Wget/1.13.4 (linux-gnu)"
SERVER_IP - - [29/Mar/2016:04:21:01 +0000] "GET /tasks/hebdomadaire.php HTTP/1.1" 200 454 "-" "Wget/1.13.4 (linux-gnu)"
SERVER_IP - - [30/Mar/2016:04:21:01 +0000] "GET /tasks/hebdomadaire.php HTTP/1.1" 200 454 "-" "Wget/1.13.4 (linux-gnu)"
SERVER_IP - - [31/Mar/2016:04:21:01 +0000] "GET /tasks/hebdomadaire.php HTTP/1.1" 200 454 "-" "Wget/1.13.4 (linux-gnu)"
SERVER_IP - - [31/Mar/2016:04:36:02 +0000] "GET /tasks/hebdomadaire.php HTTP/1.1" 200 454 "-" "Wget/1.13.4 (linux-gnu)"
SERVER_IP - - [31/Mar/2016:04:51:04 +0000] "GET /tasks/hebdomadaire.php HTTP/1.1" 200 454 "-" "Wget/1.13.4 (linux-gnu)"
SERVER_IP - - [31/Mar/2016:05:06:07 +0000] "GET /tasks/hebdomadaire.php HTTP/1.1" 200 454 "-" "Wget/1.13.4 (linux-gnu)"
SERVER_IP - - [31/Mar/2016:05:21:11 +0000] "GET /tasks/hebdomadaire.php HTTP/1.1" 200 454 "-" "Wget/1.13.4 (linux-gnu)"
SERVER_IP - - [31/Mar/2016:05:36:16 +0000] "GET /tasks/hebdomadaire.php HTTP/1.1" 200 454 "-" "Wget/1.13.4 (linux-gnu)"
SERVER_IP - - [31/Mar/2016:05:51:22 +0000] "GET /tasks/hebdomadaire.php HTTP/1.1" 200 454 "-" "Wget/1.13.4 (linux-gnu)"
SERVER_IP - - [31/Mar/2016:06:06:30 +0000] "GET /tasks/hebdomadaire.php HTTP/1.1" 200 454 "-" "Wget/1.13.4 (linux-gnu)"
SERVER_IP - - [31/Mar/2016:06:21:38 +0000] "GET /tasks/hebdomadaire.php HTTP/1.1" 200 454 "-" "Wget/1.13.4 (linux-gnu)"
SERVER_IP - - [31/Mar/2016:06:36:47 +0000] "GET /tasks/hebdomadaire.php HTTP/1.1" 200 454 "-" "Wget/1.13.4 (linux-gnu)"
SERVER_IP - - [31/Mar/2016:06:51:57 +0000] "GET /tasks/hebdomadaire.php HTTP/1.1" 200 454 "-" "Wget/1.13.4 (linux-gnu)"
SERVER_IP - - [31/Mar/2016:07:07:07 +0000] "GET /tasks/hebdomadaire.php HTTP/1.1" 200 454 "-" "Wget/1.13.4 (linux-gnu)"

怎么可能？

答案1

wget 的默认行为（手册中记录）是在默认超时 900 秒（也称为 15 分钟）后重新启动。

添加--timeout=0就解决了这里的问题。

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